VOC Meter, Display Screen Type LCD, Communication Protocol PC-Compatible Interface, USB, Battery Size AAA, Operating Temperature - Maximum 122 Degrees F, Manufacturer Warranty Length 2 yr, Operating Voltage 110V AC, Overall Width 2.4 in, Sensor Life 5 yr, Operating Humidity - Maximum 95 Percent, Operating Humidity - Minimum 0 Percent, Sensor Type Metal Oxide, Accuracy +/-1.2 Degrees F/0.1 Degrees , Alarm Setting Adjustable, Display Size 2 in WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -